Seiko Cal. 7143 - 421

Seiko 7143-421

This Spring Drive model from 1977 features a 41mm Stainless Steel case. Powered by the 7143 caliber with 36j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-6ca575deff80]

Also known as: Helmet, Emperor

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
41mm
Case Thickness
13.4mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
200m
Dial Color
White
Jewels
36j
Frequency
21,600 bph
Power Reserve
69 hours
Year
1977

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